package com.atguigu.realtime.annotion;


import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target(ElementType.FIELD) // 只能用在属性上
@Retention(RetentionPolicy.RUNTIME) // 注解的声明周期
public @interface NotSink {
}
